Least Common Multiple of 6 and 7

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023


Free LCM Calculator determines the least common multiple (LCM) between 6 and 7 the smallest integer that is 42 that is divisible by both numbers.

Least Common Multiple (LCM) of 6 and 7 is 42.

LCM(6,7) = 42

LCM of 6 and 7

Least common multiple or lowest common denominator (LCD) can be calculated in three ways;

LCM of:
and

Least Common Multiple of 6 and 7

LCM of 6 and 7 is 42

Least common multiple can be found by multiplying the highest exponent prime factors of 6 and 7. First we will calculate the prime factors of 6 and 7.

Prime Factorization of 6


2 6
3 3
1

Prime factors of 6 are 2,3. Prime factorization of 6 in exponential form is:

6 = 21×31

Prime Factorization of 7


7 7
1

Prime factors of 7 are 7. Prime factorization of 7 in exponential form is:

7 = 71

Now multiplying the highest exponent prime factors to calculate the LCM of 6 and 7.

LCM(6,7) = 21×31×71
LCM(6,7) = 42

Factors of 6

List of positive integer factors of 6 that divides 6 without a remainder.

1, 2, 3, 6

Factors of 7

List of positive integer factors of 7 that divides 7 without a remainder.

1, 7

Least Common Multiple of 6 and 7 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 6 and 7, than apply into the LCM equation.

GCF(6,7) = 1
LCM(6,7) = ( 6 × 7) / 1
LCM(6,7) = 42 / 1
LCM(6,7) = 42

Properties of LCM 6 and 7

(i) The LCM of 7 and 6 is associative

LCM of 6 and 7 = LCM of 7 and 6

Frequently Asked Questions on LCM of 6 and 7

1. What is the LCM of 6 and 7?

Answer: LCM of 6 and 7 is 42.

2. What are the Factors of 6?

Answer: Factors of 6 are 1, 2, 3, 6. There are 4 integers that are factors of 6. The greatest factor of 6 is 6.

3. What are the Factors of 7?

Answer: Factors of 7 are 1, 7. There are 2 integers that are factors of 7. The greatest factor of 7 is 7.

4. How to Find the LCM of 6 and 7?

Answer:

Least Common Multiple of 6 and 7 = 42

Step 1: Find the prime factorization of 6

6 = 2 x 3

Step 2: Find the prime factorization of 7

7 = 7

Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:

LCM = 42 = 2 x 3 x 7

Step 4: Therefore, the least common multiple of 6 and 7 is 42.